Elevator



1 H. V. MCCORMICK ELEVATOR Filed Dec. 2. 1926 2 Shets-Sheet l SvwmtozLEVATOR Filed Dec. 2, 1926 2 shew-shew 2 wemtoz Patented Nov. it

HAROLD V. MCCORMICK, F LONG BEACH, NEW YORK, ASSIGNOR, BY MESNE ASSIGN-MENTS, T0 SHUR LGC ELEVATOR SAFETY CORPGRA'IION, 0F NEWARK, NEW JER-SEY, A CORPORATION OF NEW JERSEY.

ELEVATUR.

Application filed December 2, 1926. Serial No. 152,133.

The invention is concerned particularly with means whereby movement ofthe elevator car is prevented ,when the shaft door is opened and theparticular object is to provide means for operation by the door openingdevices, whereby a switch mounted on the car and interposed in theelectrical control system is opened so as to prevent the starting of thecar when the shaft door opposite which thecar has been brought to rest,is opened or starts to open, notwithstanding the possible movement ofthe controller from {the neutral position.

The invention will be explained more fully hereinafter with reference tothe accompanying drawings in which the invention is illustrated in aconvenient and practical embodiment.

In the drawings:

Figure l is a partial view in' elevation, as seen from the inside, of atriple shaft door and its actuating devices.

Figure 2 is a view in elevation of the parts shown in Figure 1, togetherwith a portion of the car and the devices (partly broken out) whichcoact with the devices directly associated with the door.

Figure 3 is a diagrammatic view illustrating particularly the relationof the switch, the controller and the electrical connections mounted onthe car.

The shaft door, in association with which the devices hereinafterdescribed are employed, may be of any usual or suitable construction. Asshown, the door has two movable members a and a operated, for openingand closing, by a toggle system, which comprises a member I) pivoted asat h on one of the door parts, a member 5 pivoted as at b on one of thedoor parts and a member 6 connected through a plate lever Z with thefulcrum mounted upon the shattway. The toggle member 6 is pivotallyconnected at one end with the member 5 and at the same end is providedwith an operating handle 6. Its other end is pivotally connected withthe member I). The plate lever Z) is suitably connected with a pneumaticcheck 5'. All of these parts may be constructed and arranged in anysuitable manner, the toggle arrangement of the door opening and closingdevices being preferred because of the rapi movement of the door fromits wide open position and slow movement as it approaches its extremeposition of door closure, with consequent prevention of impact, and thelocking of the door When fully closed. In operative relation with thetoggle system, preferably through the plate lever, 6 is a member adaptedto be projected toward the car when the door is in other than a fullyclosed or nearly closed position.

In the construction shown,a link a is pivotally connected to the platelever b at its upper end and at its lower end is pivotally connectedwith a bell crank d, suitably mounted on a bracket cl fixed on the sillof the shaft opening, the bell crank carrying at its free end a roller(Z which, in the opening movement of the door, is projected tot ward thecar. The car, which is sufiiciently represented by a portion of thefloor at e in Figure 2, carries the usual controller f i which isprovided with contacts and electrical connections through which themovement of the car by a motor, not necessary to be shown, iscontrolled, such connections includmg connections 7 and F, in which isinterposed a switch 9, which may be of anycon- Q venient construction.

In the arrangement shown, the movable switch members g and g areoperatively connected through crank arms g and a link 9*, with a shoe itsupported on the car by bell cranks it connected by a link k formovement together. The shoe is preferably shaped at its ends,to avoidcollision in the movement of the car and is in such position on the carthat when the car is brought to rest the shoe shall stand opposite theroller d When, therefore, the shaft door is opened and the roller d isprojected against the shoe h, the latter will be moved in a directionaway from the shaft door and the switch a supp y of current to the carmotor even though. the controller f should be moved from the neutralposition indicated. It will be understood that the shoe h is normallywill be opened and thereby prevent held by its own weight in the ositionshown I claim as my invention:

1. In an elevator, the combination of a shaft door, a car, electricalcar controlling devices mounted on the car including a switch, a shoemounted upon the car in operative relation with the switch, a togglelever system for opening and closing the door, means in operativerelation with the toggle lever system to beprojected in the movement ofthe door into the path of the shoe on the car to effect movement thereofand of the switch, to prevent movement of the car.

2. In an elevator, the combination of a shaft door, a car, electricalcar controlling devices mounted on the car and including a switch, ashoe mounted on the car in operative relation with the switch, a togglelever system for opening and closing the door, a lever in operativerelation with the toggle lever system and carrying a roller to beprojected in the movement of the door into the path of the shoe on thecar to effect movement thereof and the opening of the switch.

This specification signed this 30th day of November A. D. 1926.

HAROLD V. MCCORMICK.

